﻿//////////////////////////////////////////////////////////////////////////
/*
Copyright (c) 2011-2015 Kaiming Yi
	
	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:
	
	The above copyright notice and this permission notice shall be included in
	all copies or substantial portions of the Software.
	
	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	THE SOFTWARE.
	
*/
//////////////////////////////////////////////////////////////////////////



/* Lzma86.h -- LZMA + x86 (BCJ) Filter
2009-08-14 : Igor Pavlov : Public domain */

#ifndef __LZMA86_H
#define __LZMA86_H

#include "Types.h"

EXTERN_C_BEGIN

#define LZMA86_SIZE_OFFSET (1 + 5)
#define LZMA86_HEADER_SIZE (LZMA86_SIZE_OFFSET + 8)

/*
It's an example for LZMA + x86 Filter use.
You can use .lzma86 extension, if you write that stream to file.
.lzma86 header adds one additional byte to standard .lzma header.
.lzma86 header (14 bytes):
  Offset Size  Description
    0     1    = 0 - no filter, pure LZMA
               = 1 - x86 filter + LZMA
    1     1    lc, lp and pb in encoded form
    2     4    dictSize (little endian)
    6     8    uncompressed size (little endian)


Lzma86_Encode
-------------
level - compression level: 0 <= level <= 9, the default value for "level" is 5.

dictSize - The dictionary size in bytes. The maximum value is
        128 MB = (1 << 27) bytes for 32-bit version
          1 GB = (1 << 30) bytes for 64-bit version
     The default value is 16 MB = (1 << 24) bytes, for level = 5.
     It's recommended to use the dictionary that is larger than 4 KB and
     that can be calculated as (1 << N) or (3 << N) sizes.
     For better compression ratio dictSize must be >= inSize.

filterMode:
    SZ_FILTER_NO   - no Filter
    SZ_FILTER_YES  - x86 Filter
    SZ_FILTER_AUTO - it tries both alternatives to select best.
              Encoder will use 2 or 3 passes:
              2 passes when FILTER_NO provides better compression.
              3 passes when FILTER_YES provides better compression.

Lzma86Encode allocates Data with MyAlloc functions.
RAM Requirements for compressing:
  RamSize = dictionarySize * 11.5 + 6MB + FilterBlockSize
      filterMode     FilterBlockSize
     SZ_FILTER_NO         0
     SZ_FILTER_YES      inSize
     SZ_FILTER_AUTO     inSize


Return code:
  SZ_OK               - OK
  SZ_ERROR_MEM        - Memory allocation error
  SZ_ERROR_PARAM      - Incorrect paramater
  SZ_ERROR_OUTPUT_EOF - output buffer overflow
  SZ_ERROR_THREAD     - errors in multithreading functions (only for Mt version)
*/

enum ESzFilterMode
{
  SZ_FILTER_NO,
  SZ_FILTER_YES,
  SZ_FILTER_AUTO
};

SRes Lzma86_Encode(Byte *dest, size_t *destLen, const Byte *src, size_t srcLen,
    int level, UInt32 dictSize, int filterMode);


/*
Lzma86_GetUnpackSize:
  In:
    src      - input data
    srcLen   - input data size
  Out:
    unpackSize - size of uncompressed stream
  Return code:
    SZ_OK               - OK
    SZ_ERROR_INPUT_EOF  - Error in headers
*/

SRes Lzma86_GetUnpackSize(const Byte *src, SizeT srcLen, UInt64 *unpackSize);

/*
Lzma86_Decode:
  In:
    dest     - output data
    destLen  - output data size
    src      - input data
    srcLen   - input data size
  Out:
    destLen  - processed output size
    srcLen   - processed input size
  Return code:
    SZ_OK           - OK
    SZ_ERROR_DATA  - Data error
    SZ_ERROR_MEM   - Memory allocation error
    SZ_ERROR_UNSUPPORTED - unsupported file
    SZ_ERROR_INPUT_EOF - it needs more bytes in input buffer
*/

SRes Lzma86_Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen);

EXTERN_C_END

#endif
